private void CalcCoordsAndUpdate(ColorHandler.HSV HSV)
{
// Convert color to real-world coordinates and then calculate
// the various points. HSV.Hue represents the degrees (0 to 360),
// HSV.Saturation represents the radius.
// This procedure doesn't draw anything--it simply
// updates class-level variables. The UpdateDisplay
// procedure uses these values to update the screen.
// Given the angle (HSV.Hue), and distance from
// the center (HSV.Saturation), and the center,
// calculate the point corresponding to
// the selected color, on the color wheel.
colorPoint = GetPoint((double)HSV.Hue / 255 * 360,
(double)HSV.Saturation / 255 * radius,
centerPoint);
// Given the brightness (HSV.value), calculate the
// point corresponding to the brightness indicator.
brightnessPoint = CalcBrightnessPoint(HSV.value);
// Store information about the selected color.
brightness = HSV.value;
selectedColor = ColorHandler.HSVtoColor(HSV);
RGB = ColorHandler.HSVtoRGB(HSV);
// The full color is the same as HSV, except that the
// brightness is set to full (255). This is the top-most
// color in the brightness gradient.
fullColor = ColorHandler.HSVtoColor(HSV.Hue, HSV.Saturation, 255);
}
public void Draw(Graphics g, ColorHandler.RGB RGB)
{
// Given RGB values, calculate HSV and then update the screen.
this.g = g;
this.HSV = ColorHandler.RGBtoHSV(RGB);
CalcCoordsAndUpdate(this.HSV);
UpdateDisplay();
}
public void Draw(Graphics g, ColorHandler.HSV HSV)
{
// Given HSV values, update the screen.
this.g = g;
this.HSV = HSV;
CalcCoordsAndUpdate(this.HSV);
UpdateDisplay();
}
private void SetHSV(ColorHandler.HSV HSV)
{
// Update the HSV values on the form, but don't trigger
// the ValueChanged event of the form. The isInUpdate
// variable ensures that the event procedures
// exit without doing anything.
isInUpdate = true;
RefreshValue(nudHue, HSV.Hue);
RefreshValue(nudSaturation, HSV.Saturation);
RefreshValue(nudBrightness, HSV.value);
isInUpdate = false;
}
private void HandleHSVChange(object sender, EventArgs e)
{
// If the H, S, or V values change, use this
// code to update the RGB values and invalidate
// the color wheel (so it updates the pointers).
// Check the isInUpdate flag to avoid recursive events
// when you update the NumericUpdownControls.
if (!isInUpdate)
{
changeType = ChangeStyle.HSV;
HSV = new ColorHandler.HSV((int)(nudHue.Value), (int)(nudSaturation.Value), (int)(nudBrightness.Value));
SetRGB(ColorHandler.HSVtoRGB(HSV));
this.Invalidate();
}
}
protected void OnColorChanged(ColorHandler.RGB RGB, ColorHandler.HSV HSV)
{
ColorChangedEventArgs e = new ColorChangedEventArgs(RGB, HSV);
ColorChanged(this, e);
}
public ColorChangedEventArgs(ColorHandler.RGB RGB, ColorHandler.HSV HSV)
{
mRGB = RGB;
mHSV = HSV;
}
